Remove Kernel*Set classes.

pkg/front_end/lib/src/fasta/kernel/frontend_accessors.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /// A library to help transform compounds and null-aware accessors into
 /// let expressions.
 
 import 'package:front_end/src/fasta/kernel/kernel_shadow_ast.dart'
     show
         KernelArguments,
         KernelComplexAssignment,
         KernelConditionalExpression,
         KernelMethodInvocation,
         KernelPropertyAssign,
         KernelPropertyGet,
-        KernelPropertySet,
         KernelThisExpression,
         KernelVariableDeclaration,
-        KernelVariableGet,
-        KernelVariableSet;
+        KernelVariableGet;
 
 import 'package:front_end/src/fasta/kernel/utils.dart' show offsetForToken;
 
 import 'package:front_end/src/scanner/token.dart' show Token;
 
 import 'package:front_end/src/fasta/kernel/fasta_accessors.dart'
     show BuilderHelper;
 
 import 'package:kernel/ast.dart' hide MethodInvocation, InvalidExpression;
 
@@ skipping 180 matching lines @@
       ..fileOffset = offsetForToken(token);
     complexAssignment?.read = read;
     return read;
   }
 
   Expression _makeWrite(Expression value, bool voidContext,
       KernelComplexAssignment complexAssignment) {
     helper.typePromoter.mutateVariable(variable, helper.functionNestingLevel);
     var write = variable.isFinal || variable.isConst
         ? makeInvalidWrite(value)
-        : new KernelVariableSet(variable, value)
+        : new VariableSet(variable, value)
       ..fileOffset = offsetForToken(token);
     complexAssignment?.write = write;
     return write;
   }
 }
 
 class PropertyAccessor extends Accessor {
   VariableDeclaration _receiverVariable;
   Expression receiver;
   Name name;
@@ skipping 12 matching lines @@
 
   PropertyAccessor.internal(BuilderHelper helper, this.receiver, this.name,
       this.getter, this.setter, Token token)
       : super(helper, token);
 
   Expression _makeSimpleRead() => new KernelPropertyGet(receiver, name, getter)
     ..fileOffset = offsetForToken(token);
 
   Expression _makeSimpleWrite(Expression value, bool voidContext,
       KernelComplexAssignment complexAssignment) {
-    var write = new KernelPropertySet(receiver, name, value, setter)
+    var write = new PropertySet(receiver, name, value, setter)
       ..fileOffset = offsetForToken(token);
     complexAssignment?.write = write;
     return write;
   }
 
   receiverAccess() {
     _receiverVariable ??= new VariableDeclaration.forValue(receiver);
     return new VariableGet(_receiverVariable)
       ..fileOffset = offsetForToken(token);
   }
 
   Expression _makeRead(KernelComplexAssignment complexAssignment) {
     var read = new KernelPropertyGet(receiverAccess(), name, getter)
       ..fileOffset = offsetForToken(token);
     complexAssignment?.read = read;
     return read;
   }
 
   Expression _makeWrite(Expression value, bool voidContext,
       KernelComplexAssignment complexAssignment) {
-    var write = new KernelPropertySet(receiverAccess(), name, value, setter)
+    var write = new PropertySet(receiverAccess(), name, value, setter)
       ..fileOffset = offsetForToken(token);
     complexAssignment?.write = write;
     return write;
   }
 
   Expression _finish(
       Expression body, KernelComplexAssignment complexAssignment) {
     body = makeLet(_receiverVariable, body);
     if (complexAssignment != null) {
       complexAssignment.desugared = body;
@@ skipping 16 matching lines @@
 
   Expression _makeRead(KernelComplexAssignment complexAssignment) {
     var read = new KernelPropertyGet(new KernelThisExpression(), name, getter)
       ..fileOffset = offsetForToken(token);
     complexAssignment?.read = read;
     return read;
   }
 
   Expression _makeWrite(Expression value, bool voidContext,
       KernelComplexAssignment complexAssignment) {
-    var write =
-        new KernelPropertySet(new KernelThisExpression(), name, value, setter)
-          ..fileOffset = offsetForToken(token);
+    var write = new PropertySet(new KernelThisExpression(), name, value, setter)
+      ..fileOffset = offsetForToken(token);
     complexAssignment?.write = write;
     return write;
   }
 }
 
 class NullAwarePropertyAccessor extends Accessor {
   VariableDeclaration receiver;
   Expression receiverExpression;
   Name name;
   Member getter, setter;
   DartType type;
 
   NullAwarePropertyAccessor(BuilderHelper helper, this.receiverExpression,
       this.name, this.getter, this.setter, this.type, Token token)
       : this.receiver = makeOrReuseVariable(receiverExpression),
         super(helper, token);
 
   receiverAccess() => new VariableGet(receiver);
 
   Expression _makeRead(KernelComplexAssignment complexAssignment) {
     var read = new KernelPropertyGet(receiverAccess(), name, getter)
       ..fileOffset = offsetForToken(token);
     complexAssignment?.read = read;
     return read;
   }
 
   Expression _makeWrite(Expression value, bool voidContext,
       KernelComplexAssignment complexAssignment) {
-    var write = new KernelPropertySet(receiverAccess(), name, value, setter)
+    var write = new PropertySet(receiverAccess(), name, value, setter)
       ..fileOffset = offsetForToken(token);
     complexAssignment?.write = write;
     return write;
   }
 
   Expression _finish(
       Expression body, KernelComplexAssignment complexAssignment) {
     var nullAwareGuard = new KernelConditionalExpression(
         buildIsNull(receiverAccess(), offsetForToken(token)),
         new NullLiteral(),
@@ skipping 371 matching lines @@
 
 Expression buildIsNull(Expression value, int offset) {
   return makeBinary(value, equalsName, null, new NullLiteral(), offset: offset);
 }
 
 VariableDeclaration makeOrReuseVariable(Expression value) {
   // TODO: Devise a way to remember if a variable declaration was reused
   // or is fresh (hence needs a let binding).
   return new VariableDeclaration.forValue(value);
 }